20732425 has 12 divisors (see below), whose sum is σ = 29381056. Its totient is φ = 14216400.

The previous prime is 20732399. The next prime is 20732441. The reversal of 20732425 is 52423702.

It is not a de Polignac number, because 20732425 - 2⁹ = 20731913 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20732425.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 59061 + ... + 59410.

Almost surely, 2^20732425 is an apocalyptic number.

20732425 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20732425 is a deficient number, since it is larger than the sum of its proper divisors (8648631).

20732425 is a wasteful number, since it uses less digits than its factorization.

20732425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 118488 (or 118483 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 25.

The square root of 20732425 is about 4553.2872740472. The cubic root of 20732425 is about 274.7156289048.

The spelling of 20732425 in words is "twenty million, seven hundred thirty-two thousand, four hundred twenty-five".